Lock nut



Dec. l0, 1929. c. MURPHY Mmm E @sl-unl Patented Dec.- l0, 1929 UNITEDSTATES CHARLES MURPHY, or LITTLETN, .WEST VIRGINIA Loox Nur lApplication med January s, 192s.'y serrant. 245,565.

' This invention relates to lock nuts, and its general object is toprovidea bolt including a nut that is normally retained in arpositionwhereby it can be threaded on and off of its bolt by a wrench or t-helike, or can be secured against movement in either direction.

A further object of the invention is to provide a lock nut that ispositive in function, simple in construction, inexpensive to manufactureand efficient in operation and service.

This invention also consists in certain other features of construct-ionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim.

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which:

Figure 1 is a fragmentary side elevation of a bolt and nut constructedin accordance v with my invention.

Figure 2 is a top plan view thereof.

Figure 3 is a horizontal sectional view taken through the bolt and nutand showing the locking mechanism thereof in open position,

Figure 4 is a similar view with the parts in locked position.

Figure 5 is a perspective view of the latch member.

Figure 6 is a similar view of the cam lever.

Referring to the drawings in detail, the reference numeral 1 indicates abolt which as shown is provided with threads 2 interrupted at .spacedintervals by rows of substantially V-shaped recesses 3. The rows of 4recesses extend longitudinally of the bolt as shown.

The nut which is indicated by the reference numeral 4 is shown as beinghexagon in shape,

but of course it can be of any desired shape,

r and formed in the nut in a manner to extend from one flat surfacethereof and terminating at the inner portion is a slot 5 provided withinwardly disposed curved side walls as best shown in Figure 3.

5 Pivotally secured through the medium of apin 6 and disposed -in theslot 5 is a latch member 7 "formed with a -recessat its secured end to`accommodate 'a coil spring` 8 carried by the' pinv andhavingfits'endconvolutions engaging the adjacent sidewall of the slot andthelatch'member respectively for the purpose 'of retaining the ylatchmember normally in unlatched posit-ion as shown in Figure 3. Thesidewall of the slot that receives the end convolution ofthe spring isnotched 0 for thatpurposel soas to avoid casual displacement ofthefsprngas will be apparent.

In orderto operatethelatch member to its operative position" as shown inFigure 4, I have provided a lever 9 pivotally secured in 65 the slotthrough the medium of a pin 10 and said lever is formed with a camsurface for engagement with the latch to secure the free end of thelatter into some of the recesses ofV one of the rows so as to preventmovement'of the nut in either direction as will be apparent.

The lever 9 may be held in either of its positions as shown in Figures 3and 4 through the medium of a pin 11 adapted torbe detachably receivedin either one of openings arranged in-cooperating pairs and indicatingrespectively by the reference numerals 12 and 13. The openings' 12 and13 are formed in the top and lbottom walls of the slot and extendentirely through the top wall so that the pin 11 can lbe inserted in theopenings as set forth.

From the above description and disclosure .of the drawings, it will beobvious that I have provided a bolt and nut cooperating with each otherin a manner whereby the nut can be locked at any desired position on thebolt to prevent movement of the nut in either direction, or if desiredthe latch can be retained in its normal position as shown in Figure 3,so as to allow free movement of the nut.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the constructionand in the combination and arrangement of the several part-s, providedthat such changes fall within the scope of the appended claim.

l What I claim is:

In a lock nut, a threaded bolt having recesses interrupting the threadsthereof and extending longitudinally of the bolt, a nut for said boltand being provided with a slot laterally forifned therein and having`rounded Walls curved int-o the bore of the'nut, a pivoted latcharranged in said slot and adapted to he received in the recessestopreven't rrlv-y ment of said nut on said bolt, said latch having arecess formed in its secured end, a coi spring received by ther-pivotofthe latchfand having its ends engageable with a Wall of the recess ofthe latch and-one wall'of the slot to put lthe latch under; pressure toheld it out of the recesses `of the holt; Said last mentioned Wall beingnotched to receive its end ofthe spring, a lever pivoted in said slotand having a cam yface engageable with the latch for-moving. theV sameto itsoperative position in the recesses of the bolt, and aI pin adaptedto be arranged in ang,r one'V apair of Openings disposed lthrough theWalls of the slot and the nut orsecuringy said lever infnorinal oroperative 'position'.I

In rtestimony wh ereof I` aix .msi nature.

CHARLES Rl HY.

